As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK & ENGINE START. DURING RECALL, THE LEFT PACK AND CONTROL CABIN ZONE TEMP & AFT CABIN ZONE TEMP LIGHTS ILLUMINATED AMBER. RETURN TO GATE. ACFT GROUNDED. RIGHT PFTC SHOWS MAINTENANCE MESSAGE 21-51154 (ARINC FAULT). LEFT PFTC DOES NOT POWER UP. REPLACED LEFT PFTC. GROUND VERIFICATION TESTED NORMAL IAW AMM 2161-17-400-400.